1. React separates the user interface into components. How are components combinded to create a user interface?

2. What function allows you to render React content in an HTML page?

3. What is the default local host port that a React development server uses?

4. Which of the following function is used to change the state of the React.js component?

5.  How many ways of defining your variables in ES6?

6. Who Develop React.js?

7. React can only render elements in the root document element.

8.  To create a constant in JavaScript, which keyword do you use?

9. Consider the following code from React Router. What do you call :id in the path prop? > Route path=”/:id” / >

10. What is the purpose of useEffect hook in React?

11. Which of the following command is used to Install create-react-app?

12. Which operator can be used to conditionally render a React component?

13. What is the correct syntax to import a Component from React?

14.  React.js is written in which of the following language?

15. What will be the output of the following code?

import React, { Component } from 'react';  
const App = () => {  
    
      return(  
          < div >  
             < h1 className = "hello" > {25+20}< /h1 >   
          < /div >  
      );   
}  
export default App;